Q: Will a macbook pro bought in china work in the uk?

You can change the DVD region, but after you change it the 5th time, it will permanently stay locked on that region: http://support.apple.com/kb/HT2397.  You can purchase an adapter for the plug and you will be fine.  No need to worry if there is a difference in voltage at the power sockets, macs have built in auto switching: http://support.apple.com/kb/HT1981.

Welcome

It will work anywhere in the world. The power adaptor covers voltage from 110 to 240 V, you may at the worst need a socket adaptor, which is a tiny $ 1–2 item. yes, you will change DVD region, but you may do that 5 times, if not wrong.

Kevin, if you don't want to splash out on the Universal Adapter kit, you can use a standard figure-of-eight power lead as used for radios, CD Players and a whole lot of other electrical/electronic devices.

Most electrical stores should be able to get a spare, or you can just borrow one from another unit.